X-ray generator and x-ray utilization system

Abstract

An X-ray generator includes an X-ray tube, a blower fan having a motor and configured to provide the X-ray tube with air, a motor control unit configured to control a rotation speed of the motor, and a casing to which the X-ray tube and the blower fan are attached. The motor control unit shifts the rotation speed of the motor from a resonance frequency of a structure including the X-ray tube and the casing. According to this configuration, a resonance phenomenon caused by vibration generated by the motor is avoided. Therefore, influences of vibration on the X-ray tube are reduced. As a result, the X-ray generator can be operated in a highly stable manner.

1 . An X-ray generator comprising:
 an X-ray tube;   a heat medium providing unit having a motor and configured to provide the X-ray tube with a heat medium;   a motor control unit configured to control a rotation speed of the motor; and   a device casing to which the X-ray tube and the heat medium providing unit are attached,   wherein the motor control unit is configured to shift the rotation speed of the motor from a resonance frequency of a structure including the X-ray tube and the device casing.   
     
     
         2 . The X-ray generator according to  claim 1  further comprising:
 an X-ray control unit configured to control an intensity of X-rays output from the X-ray tube, 
 wherein the motor control unit is configured to control the rotation speed of the motor on the basis of the intensity of X-rays. 
 
     
     
         3 . The X-ray generator according to  claim 2 ,
 wherein the motor control unit is configured to increase the rotation speed of the motor as the intensity of X-rays increases, and decrease the rotation speed of the motor as the intensity of X-rays decreases.   
     
     
         4 . The X-ray generator according to  claim 1 ,
 wherein the heat medium providing unit includes a fan rotated by the motor and provides the X-ray tube with gas serving as the heat medium by using the fan.   
     
     
         5 . The X-ray generator according to  claim 1  further comprising:
 an accommodation portion that accommodates the X-ray tube and is attached to the device casing, 
 wherein the accommodation portion is disposed at a position away from the heat medium providing unit. 
 
     
     
         6 . The X-ray generator according to  claim 5  further comprising:
 a resin block unit that includes a power source providing the X-ray tube with a voltage, 
 wherein the accommodation portion is attached to the device casing with the resin block unit therebetween. 
 
     
     
         7 . An X-ray utilization system comprising:
 an X-ray generator having an X-ray tube, a heat medium providing unit having a motor and configured to provide the X-ray tube with a heat medium, and a device casing to which the X-ray tube and the heat medium providing unit are attached;   a motor control device configured to control a rotation speed of the motor; and   a system casing to which the X-ray generator is attached,   wherein the motor control device is configured to shift the rotation speed of the motor from a resonance frequency of a structure including the X-ray generator and the system casing.   
     
     
         8 . An X-ray utilization system comprising:
 an X-ray generator having an X-ray tube, a device casing to which the X-ray tube is attached, and a motor control unit;   a heat medium providing device having a motor and configured to provide the X-ray tube with a heat medium; and   a system casing to which the X-ray generator and the heat medium providing device are attached,   wherein the motor control unit is configured to shift a rotation speed of the motor from a resonance frequency of a structure including the X-ray generator and the system casing.   
     
     
         9 . An X-ray utilization system comprising:
 an X-ray generator having an X-ray tube and a device casing to which the X-ray tube is attached;   a heat medium providing device having a motor and configured to provide the X-ray generator with a heat medium;   a motor control device configured to control a rotation speed of the motor; and   a system casing to which the X-ray generator and the heat medium providing device are attached,   wherein the motor control device is configured to shift the rotation speed of the motor from a resonance frequency of a structure including the X-ray generator and the system casing.